Earth's Motion

Long time ago, Egyptians invented the oldest tool used for measuring the time. What is it called?

• sundial

• wrist watch

• clock tower

• wall clock

All the statements are true about the moon, except one. Which one is it?

• The moon cycle has 8 phases.

• The moon complete orbit around the Earth takes 29.5 days.

• New moon happens when the moon is between the Earth and the Sun.

• Full moon happens when the Sun is in between the Earth and the moon.

Why does the moon have many craters?

• It has no atmosphere to protect itself from the impact of other space objects.

• It attracts meteoroids.

• It does not have its own light.

• It has 8 moon phases.

The moon does not have its own light. Where does its light come from?

• from the Earth

• from the Sun

• from the meteoroids in space

• from the other planets

Ali noticed that there was no moon visible in the sky in one summer night. He was wondering where it went. Can you help Ali?

• It is new moon. When the Moon is in between the Earth and the Sun, the dark side of the moon is facing towards the Earth, so it is not visible.

• It is new moon because the Earth is between the Sun and the moon. The Earth blocks the light from the Sun.

• It is new moon because the moon has no light. It will only have light when the Sun is between the Earth and the Moon.

• It is a new moon because meteoroids blocks the light of the sun, thus not allowing light to reach the moon.

What is the moon phase when the entire side of the moon is lit?

• new moon

• first quarter

• third quarter

• full moon

How many phases does the moon have?

• 6

• 7

• 8

• 9

Day and night is a result of the Earth's ________

• rotation

• revolution

• moon cycle

• tides

One complete rotation is ______

• 24 hours

• 12 hours

• 29 days

• 365 1/4 days

What are the causes of four seasons? Choose two answers.

• Earth's rotation

• Earth's revolution

• Earth's tilt

• Earth's tides